In this section, we will recall briefly some basic facts of Randall-Sundrum
type II braneworld model [1]}. We suppose that the univers is
filled with a perfect fluid with energy density \(\rho (t)\)  and pressure \(p(t) \)  in which the Friedmann equation is modified from its usual form [2]}
\(H^{2}=k\rho _{\phi }\left[ 1+\frac{\rho _{\phi }}{2\lambda }\right] +\frac{\Lambda _{4}}{3}+\frac{\xi }{a^{4}}\) 
